package com.zhang.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author zhangshihao
 * @create 2023-02-28 19:06
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 登录成功之后，应该有用户的session；
        Object loginUser = request.getSession().getAttribute("loginUser");
        if (loginUser == null){ // 没有登录
            request.setAttribute("msg", "没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request, response);
            return false;
        }else {
            return true;
        }
    }
}
